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Finding the Fourth Proportional to 279,007.20, 418,510.80 and 121,543.20

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Solution

The fourth proportional to 279,007.20, 418,510.80 and 121,543.20 is: 182,314.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,007.20 : 418,510.80 = 121,543.20 : x
  2. Step 2: Convert to fraction form
    279,007.20/418,510.80 = 121,543.20/x
  3. Step 3: Cross multiply
    279,007.20x = 418,510.80 × 121,543.20
  4. Step 4: Simplify right side
    279,007.20x = 50,867,141,866.56
  5. Step 5: Solve for x
    x = 50,867,141,866.56/279,007.20
  6. Step 6: Final answer
    x = 182,314.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.